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Method and equipment for treating high-concentration refractory chemical wastewater

A technology for chemical wastewater and treatment methods, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, low efficiency, secondary pollution, etc., and achieve good Effects of processing effects

Inactive Publication Date: 2014-08-20
LIYANG SHENGTAI HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are obviously problems such as low efficiency, high cost, and secondary pollution in the traditional process.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] The high-concentration refractory chemical wastewater treatment method of the present invention comprises the following steps:

[0027] (1) Separation

[0028] The high-concentration refractory chemical wastewater flows into the coagulation tank through the pipeline. In the coagulation tank, an appropriate amount of saturated lime solution is added to adjust the pH value to 7.5 under stirring through a dosing device, and then 300mg / L Na 2 CO 3 , and then add 5mg / L of FeSO 4 , then add Na 2 CO 3 Reversely adjust the pH value to 7, and finally add 1mg / L polyacrylamide (PAM) and 3mg / L flocculant. After the reaction is complete, enter the inclined tube sedimentation tank for precipitation and separation, so as to remove calcium and magnesium in the wastewater and reduce water pollution. The hardness of the sediment is sent to the sludge tank through pumps and pipelines, and finally it is filtered and separated in the dehydration device; the filtered and separated wastew...

Embodiment 2

[0044] The high-concentration refractory chemical wastewater treatment method of the present invention comprises the following steps:

[0045] (1) Filtration separation

[0046] The high-concentration refractory chemical wastewater flows into the coagulation tank through the pipeline. In the coagulation tank, an appropriate amount of saturated lime solution is added to adjust the pH value to 8 through the dosing device under stirring, and then 150mg / L Na 2 CO 3 , and then add 2.5mg / L of FeSO 4 , then add Na 2 CO 3 Reversely adjust the pH value to 8, and finally add 1.5mg / L polyacrylamide and 4mg / L flocculant. After the reaction is complete, enter the inclined tube sedimentation tank for sedimentation and separation, so as to remove calcium and magnesium in papermaking advanced treatment wastewater, reduce The hardness of the water, the sediment (that is, the sludge) is sent into the sludge tank through the pump and the pipeline, and finally filtered and separated in the sl...

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PUM

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Abstract

The invention discloses a method and equipment for treating high-concentration refractory chemical wastewater. The method is formed by organically combining an efficient inorganic salt and organic salt separation technology, an improved organic matter degradation technology and an efficient organic matter filtration removal technology. The method is relatively low in treatment cost, relatively high in efficiency, relatively good in effect and capable of enhancing the biological reduction of refractory organisms and reducing environment pollution caused by chemical wastewater.

Description

technical field [0001] The invention relates to a treatment method and equipment for chemical wastewater. Background technique [0002] In the chemical industry production wastewater, there will be a large amount of toxic and refractory organic substances, such as phenol, nitrobenzene, halogenated, azo-containing and nitroaromatic compounds, etc. The discharge of chemical wastewater into rivers not only seriously pollutes water sources, but also causes a lot of waste of resources. For example, the paper industry, which is traditionally a large water user, is one of the important sources of water pollution. The discharge of wastewater and COD in the paper industry ranks first in the discharge of industrial wastewater in my country. The pollution of the water environment by the paper industry is very serious. Toxic and refractory compounds contained in chemical wastewater enter the natural environment through various channels, showing the characteristics of long-term residue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 魏锋洪锋余冉彭勇陶运艇
Owner LIYANG SHENGTAI HEAVY MACHINERY
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